I replaced them on my 126 as they were well stretched and during cornering you could hear the exhaust swing and make contact (thump!).

On the 126 there are two types - one set that is closer to the muffler and one set that is near the center of the car (pre-muffler or cats?).

__________________
~shell
As of 2/2010:
2001 CLK55 0o\=*=/o0
13.6 @ 106mph
10K mi
1984 300SD
260K mi and going and going...
97 S600
46K miles
1991 Sentra SE-R (extremely dorked with)
www.se-r.net